Objectid serialization and deserialization of MVC when using MongoDB

The previous write using your own MVC serialization tool is Jsonnetresult. I'm going to do a JSON serialization tool with the previously written Jsonnetresult, and serialize Objectid into a string. The specific code is as follows

Using system;using system.io;using system.text;using system.web.mvc;using aft.build.common;using Newtonsoft.Json;        Using Newtonsoft.json.serialization;namespace aft.build.mvcweb.common{public class Jsonnetresult:jsonresult { Public Jsonnetresult () {Settings = new Jsonserializersettings {Reference        loophandling = Referenceloophandling.error};  } public Jsonnetresult (object data, jsonrequestbehavior behavior = jsonrequestbehavior.allowget, String contentType            = NULL, Encoding contentencoding = null) {data = data;            Jsonrequestbehavior = behavior;            ContentEncoding = contentencoding;        ContentType = ContentType;        } private Jsonserializersettings _settings; Public jsonserializersettings Settings {get {_settings = _settings?? New Js                Onserializersettings (); _settings. Contractresolver =New Camelcasepropertynamescontractresolver (); _settings.                Converters.add (New Objectidconverter ());            return _settings;        } private Set {_settings = value;}                public override void Executeresult (ControllerContext context) {if (context = = null)            throw new ArgumentNullException ("context"); if (Jsonrequestbehavior = = Jsonrequestbehavior.denyget && string. Equals (context. HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase)) throw new Invalidoperationexcep            tion ("JSON GET is not allowed"); var response = context.            Httpcontext.response; Response. ContentType = string. IsNullOrEmpty (ContentType)?            "Application/json": ContentType; if (contentencoding! = null) response.            ContentEncoding = contentencoding;            if (Data = = null) return; var Scriptserializer = Jsonserializer.creaTe (Settings);                using (var sw = new StringWriter ()) {scriptserializer.serialize (SW, Data); Response. Write (SW.            ToString ()); }        }    }}

Add a line of code to Jsonnetresult:

_settings. Converters.add (New Objectidconverter ());

Our objectidconverter is specifically implemented as follows:

Using system;using mongodb.bson;using newtonsoft.json;namespace aft.build.common{public    class Objectidconverter : Jsonconverter    {public        override void Writejson (Jsonwriter writer, object value, Jsonserializer serializer)        {            Serializer. Serialize (writer, value.) ToString ());        }        public override Object Readjson (Jsonreader reader, Type objectType, Object Existingvalue, Jsonserializer serializer)        {            ObjectId result;            Objectid.tryparse (reader. Value As String, out result);            return result;        }        public override bool Canconvert (Type objectType)        {            return typeof (ObjectId). IsAssignableFrom (ObjectType);}}}    

This jsonnetresult has the ability to serialize Objectid types of data. Of course, other things that have special needs sequences are implemented in a similar way.

Serialization is complete, followed by deserialization, if the Objectid string is not processed, the Objectid object becomes objectid.empt (that is, all 00), or it is received using a string, but this is not what we want to see.

We use MVC Modelbinder to implement Objectid object deserialization

The specific code is as follows:

Add Reference

Using system;using system.web.mvc;using Mongodb.bson;

Code implementation:

public class Objectidmodelbinder:imodelbinder {public Object Bindmodel (ControllerContext controllercontext, M                Odelbindingcontext BindingContext) {if (Bindingcontext.modeltype! = typeof (ObjectId)) {            return objectid.empty;            } var val = BindingContext.ValueProvider.GetValue (bindingcontext.modelname);            if (val = = null) {return objectid.empty; } var value = val.            Attemptedvalue; if (value = = null) {BindingContext.ModelState.AddModelError (bindingcontext.modelname, "wrong VA                Lue type ");            return objectid.empty;            } ObjectId result;            if (Objectid.tryparse (value, out result)) {return result;        } return objectid.empty; }} public class Objectidprovider:imodelbinderprovider {public Imodelbinder GetBinder (Type modeltype) {if (Modeltype = = typeof (ObjectId) | | modeltype = typeof (ObjectId?))            {return new Objectidmodelbinder ();        } return null; }    }

Global registration, add the following code to the Global.asax file Application_Start method:

MODELBINDERPROVIDERS.BINDERPROVIDERS.ADD (New Objectidprovider ());

So Objectid deserialization is done, is not very simple, hehe.